Almost all career guidance technologies, standards and approaches for IT-workers relate to technical or soft skills, but do not take into account that not all people can become the masters in IT domain because of some limitations of their abilities. Unfortunately, human psychological abilities are often out of HRs’ focus. That is why, we wished to study important abilities of IT-learners in projection on professionally important qualities of IT professionals from point of view of evolution (changes) of some intelligence and personality indices on the edge of a human transition from adolescent to young adult as a future IT-specialist. It has been revealed that structure of intelligence can change at micro-age intervals over the high school and university learning, though the most popular view of researchers was relatively stable level of intelligence after 15 years-old. Besides, our research has demonstrated a difference in that structure in high school pupils and university students despite the fact that all students studied in specialized classes or faculties and represented selective samples. Our findings allowed to propose educators to adapt educational process of IT-learners with regard to specific and/or non-specific training such professionally important psychological qualities as ability to solve practical computational tasks and operation with specials objects (both 2D and 3D)